O-(N-acetyl-a-neuraminosyl)-(2->6)-O-b-D-galactopyranosyl-(1->4)-O-2-(acetylamino)-2-deoxy-b-D-glucopyranosyl-(1->3)-O-[O-6-deoxy-a-L-galactopyranosyl-(1->3)-O-[b-D-galactopyranosyl-(1->4)]-2-(acetylamino)-2-deoxy-b-D-glucopyranosyl-(1->6)]-O-b-D-mannopyr